Ebert and Roeper
It's when you give a girl a thumbs up with both hands. One for the front, one for the back.
My girlfriend passed her driving test. I gave her two thumbs up. One for the front, one for the back.
That kid did a flip in the hallway. I gave him two thumbs up. One for the front, one for the back.
My mom baked a cake. I gave her two thumbs up. One for the front, one for the back.